/**
 * javascript/containers.js
 *
 * Containers panel: table of all containers with lifecycle actions
 * (start/stop/restart/remove), backed entirely by ajax/containers.php.
 */
(function () {
  'use strict';
  const P = window.Podman;
  let allContainers = [];
  let filter = 'all';
  let searchTerm = '';

  function iconLabel(name) {
    return P.escapeHtml(name.slice(0, 2).toUpperCase());
  }

  function rowHtml(c) {
    const cpuMem = c.state === 'running'
      ? '<span class="podman-row-sub">running</span>'
      : '<span class="podman-row-sub">&mdash;</span>';

    return '' +
      '<tr data-id="' + P.escapeHtml(c.id) + '">' +
      '<td><span class="podman-chip ' + P.stateChipClass(c.state) + '"><span class="d"></span>' + P.escapeHtml(c.health || c.state) + '</span></td>' +
      '<td><div class="podman-row-name"><span class="ico">' + iconLabel(c.name) + '</span>' + P.escapeHtml(c.name) + '</div></td>' +
      '<td class="mono podman-row-sub">' + P.escapeHtml(c.image) + '</td>' +
      '<td>' + cpuMem + '</td>' +
      '<td class="mono podman-row-sub">' + P.escapeHtml(c.ports.join(', ') || '&mdash;') + '</td>' +
      '<td class="tnum">' + P.formatDuration(c.uptimeSeconds) + '</td>' +
      '<td class="podman-actions">' + actionButtons(c) + '</td>' +
      '</tr>';
  }

  function actionButtons(c) {
    if (c.state === 'running') {
      return '' +
        '<button class="podman-btn podman-btn-icon" data-action="restart" title="Restart">&#8635;</button>' +
        '<button class="podman-btn podman-btn-icon" data-action="stop" title="Stop">&#9632;</button>' +
        '<button class="podman-btn podman-btn-icon" data-action="remove" title="Remove" disabled>&#128465;</button>';
    }
    return '' +
      '<button class="podman-btn podman-btn-icon" data-action="start" title="Start">&#9654;</button>' +
      '<button class="podman-btn podman-btn-icon" data-action="remove" title="Remove">&#128465;</button>';
  }

  function applyFilters() {
    return allContainers.filter(function (c) {
      if (filter === 'running' && c.state !== 'running') return false;
      if (filter === 'stopped' && c.state === 'running') return false;
      if (searchTerm && c.name.toLowerCase().indexOf(searchTerm) === -1 && c.image.toLowerCase().indexOf(searchTerm) === -1) return false;
      return true;
    });
  }

  function renderTable() {
    const tbody = P.el('containers-tbody');
    const visible = applyFilters();
    tbody.innerHTML = visible.length
      ? visible.map(rowHtml).join('')
      : '<tr><td colspan="7" class="podman-empty-note">No containers match.</td></tr>';
  }

  function renderCounts() {
    const running = allContainers.filter(function (c) { return c.state === 'running'; }).length;
    P.el('containers-count-all').textContent = 'All ' + allContainers.length;
    P.el('containers-count-running').textContent = 'Running ' + running;
    P.el('containers-count-stopped').textContent = 'Stopped ' + (allContainers.length - running);
  }

  function load() {
    const tbody = P.el('containers-tbody');
    tbody.innerHTML = P.loadingRow(7);
    return P.get('containers', 'list').then(function (data) {
      allContainers = data;
      renderCounts();
      renderTable();
    }).catch(function (err) {
      tbody.innerHTML = P.errorRow(7, err.message);
    });
  }

  function handleAction(id, action, btn) {
    const doIt = function (extra) {
      btn.disabled = true;
      return P.post('containers', action, Object.assign({ id: id }, extra)).then(load).catch(function (err) {
        alert('Action failed: ' + err.message);
        btn.disabled = false;
      });
    };
    if (action === 'remove') {
      if (!confirm('Remove this container? This does not remove its volumes.')) return;
      doIt({ force: true });
    } else {
      doIt({});
    }
  }

  function init() {
    P.el('containers-search').addEventListener('input', function (e) {
      searchTerm = e.target.value.trim().toLowerCase();
      renderTable();
    });

    document.querySelectorAll('#containers-filterset button').forEach(function (btn) {
      btn.addEventListener('click', function () {
        document.querySelectorAll('#containers-filterset button').forEach(function (b) { b.classList.remove('active'); });
        btn.classList.add('active');
        filter = btn.dataset.filter;
        renderTable();
      });
    });

    P.el('containers-tbody').addEventListener('click', function (e) {
      const btn = e.target.closest('button[data-action]');
      if (!btn || btn.disabled) return;
      const row = btn.closest('tr');
      handleAction(row.dataset.id, btn.dataset.action, btn);
    });

    return load();
  }

  P.registerPanel('containers', { init: init, refresh: load });
})();